Billingsfors avloppsreningsver - Advanced Wastewater Treatment in Billingsfors, Sweden

Billingsfors avloppsreningsver is a municipal wastewater treatment plant located in Billingsfors, a locality in Bengtsfors kommun, Västra Götalands län, Sweden. The plant serves a population of 712 and is part of the region's wastewater infrastructure. The plant provides advanced treatment, which goes beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 3,100 m³/day and a current discharge volume of 111.77 m³/day, the plant operates well below its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), Sweden requires advanced treatment for sensitive areas, and plants serving smaller agglomerations like this one are expected to meet secondary treatment standards at minimum. The treated effluent is discharged into local waterways that drain into the Baltic Sea via the Göta älv river system. The plant plays a key role in protecting downstream water quality in the region's lakes and rivers, which support diverse aquatic life and are used for recreation.

The plant discharges into local watercourses that flow into the Upperud River and eventually the Göta älv, which drains into the Kattegat and the Baltic Sea. The surrounding watershed includes numerous lakes and forests, providing habitat for fish and migratory birds. The advanced treatment helps reduce nutrient loading, which is critical for preventing eutrophication in the sensitive Baltic Sea ecosystem.